@article{RM_1974_29_5_a18,
author = {P. R. Popivanov},
title = {The local solvability of pseudodifferential equations wtih double characteristics},
journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
year = {1974},
volume = {29},
number = {5},
language = {ru},
url = {http://geodesic.mathdoc.fr/item/RM_1974_29_5_a18/}
}
P. R. Popivanov. The local solvability of pseudodifferential equations wtih double characteristics. Trudy Matematicheskogo Instituta imeni V.A. Steklova, Tome 29 (1974) no. 5. http://geodesic.mathdoc.fr/item/RM_1974_29_5_a18/
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